/*
 * @(#)JdbcStatementImpl.java
 *
 * @author	  Orlin Tomov
 * 
 */

package dbu.jdbc.facade;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.Statement;

/**
 * <P>The object used for executing a static SQL statement
 * and returning the results it produces.
 * <P>
 * By default, only one <code>ResultSet</code> object per <code>Statement</code>
 * object can be open at the same time. Therefore, if the reading of one 
 * <code>ResultSet</code> object is interleaved
 * with the reading of another, each must have been generated by
 * different <code>Statement</code> objects. All execution methods in the
 * <code>Statement</code> interface implicitly close a statment's current 
 * <code>ResultSet</code> object if an open one exists.
 *
 * @see Connection#createStatement
 * @see ResultSet 
 */
public abstract class JdbcStatementImpl extends JdbcWrapper implements Statement {

	/**
	 * Executes the given SQL statement, which returns a single 
	 * <code>ResultSet</code> object.
	 *
	 * @param sql an SQL statement to be sent to the database, typically a 
	 *		static SQL <code>SELECT</code> statement
	 * @return a <code>ResultSet</code> object that contains the data produced 
	 *		 by the given query; never <code>null</code> 
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code> or the given
	 *			SQL statement produces anything other than a single
	 *			<code>ResultSet</code> object
	 */
	@Override
	public ResultSet executeQuery(String sql) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Executes the given SQL statement, which may be an <code>INSERT</code>, 
	 * <code>UPDATE</code>, or <code>DELETE</code> statement or an
	 * SQL statement that returns nothing, such as an SQL DDL statement.
	 *
	 * @param sql an SQL Data Manipulation Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or
	 * <code>DELETE</code>; or an SQL statement that returns nothing, 
	 * such as a DDL statement.
	 *
	 * @return either (1) the row count for SQL Data Manipulation Language (DML) statements
	 *		 or (2) 0 for SQL statements that return nothing
	 *
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code> or the given
	 *			SQL statement produces a <code>ResultSet</code> object
	 */
	@Override
	public int executeUpdate(String sql) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Releases this <code>Statement</code> object's database 
	 * and JDBC resources immediately instead of waiting for
	 * this to happen when it is automatically closed.
	 * It is generally good practice to release resources as soon as
	 * you are finished with them to avoid tying up database
	 * resources.
	 * <P>
	 * Calling the method <code>close</code> on a <code>Statement</code>
	 * object that is already closed has no effect.
	 * <P>
	 * <B>Note:</B>When a <code>Statement</code> object is 
	 * closed, its current <code>ResultSet</code> object, if one exists, is 
	 * also closed.  
	 *
	 * @exception SQLException if a database access error occurs
	 */
	@Override
	public void close() throws SQLException {
		throw new SQLException("not supported");
	}

	//----------------------------------------------------------------------

	/**
	 * Retrieves the maximum number of bytes that can be
	 * returned for character and binary column values in a <code>ResultSet</code> 
	 * object produced by this <code>Statement</code> object.
	 * This limit applies only to  <code>BINARY</code>, <code>VARBINARY</code>,
	 * <code>LONGVARBINARY</code>, <code>CHAR</code>, <code>VARCHAR</code>,
	 * <code>NCHAR</code>, <code>NVARCHAR</code>, <code>LONGNVARCHAR</code> 
	 * and <code>LONGVARCHAR</code> columns.  If the limit is exceeded, the 
	 * excess data is silently discarded.
	 *
	 * @return the current column size limit for columns storing character and 
	 *		 binary values; zero means there is no limit 
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @see #setMaxFieldSize
	 */
	@Override
	public int getMaxFieldSize() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Sets the limit for the maximum number of bytes that can be returned for
	 * character and binary column values in a <code>ResultSet</code>
	 * object produced by this <code>Statement</code> object.
	 * 
	 * This limit applies
	 * only to <code>BINARY</code>, <code>VARBINARY</code>,
	 * <code>LONGVARBINARY</code>, <code>CHAR</code>, <code>VARCHAR</code>,
	 * <code>NCHAR</code>, <code>NVARCHAR</code>, <code>LONGNVARCHAR</code> and
	 * <code>LONGVARCHAR</code> fields.  If the limit is exceeded, the excess data
	 * is silently discarded. For maximum portability, use values
	 * greater than 256.
	 *
	 * @param max the new column size limit in bytes; zero means there is no limit 
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code> 
	 *			or the condition max >= 0 is not satisfied
	 * @see #getMaxFieldSize
	 */
	@Override
	public void setMaxFieldSize(int max) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Retrieves the maximum number of rows that a
	 * <code>ResultSet</code> object produced by this
	 * <code>Statement</code> object can contain.  If this limit is exceeded, 
	 * the excess rows are silently dropped.
	 *
	 * @return the current maximum number of rows for a <code>ResultSet</code>
	 *		 object produced by this <code>Statement</code> object; 
	 *		 zero means there is no limit
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @see #setMaxRows
	 */
	@Override
	public int getMaxRows() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Sets the limit for the maximum number of rows that any
	 * <code>ResultSet</code> object  generated by this <code>Statement</code>
	 * object can contain to the given number.
	 * If the limit is exceeded, the excess
	 * rows are silently dropped.
	 *
	 * @param max the new max rows limit; zero means there is no limit 
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code> 
	 *			or the condition max >= 0 is not satisfied
	 * @see #getMaxRows
	 */
	@Override
	public void setMaxRows(int max) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Sets escape processing on or off.
	 * If escape scanning is on (the default), the driver will do
	 * escape substitution before sending the SQL statement to the database.
	 *
	 * Note: Since prepared statements have usually been parsed prior
	 * to making this call, disabling escape processing for 
	 * <code>PreparedStatements</code> objects will have no effect.
	 *
	 * @param enable <code>true</code> to enable escape processing;
	 *	   <code>false</code> to disable it
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 */
	@Override
	public void setEscapeProcessing(boolean enable) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Retrieves the number of seconds the driver will
	 * wait for a <code>Statement</code> object to execute. 
	 * If the limit is exceeded, a
	 * <code>SQLException</code> is thrown.
	 *
	 * @return the current query timeout limit in seconds; zero means there is 
	 *		 no limit 
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @see #setQueryTimeout
	 */
	@Override
	public int getQueryTimeout() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Sets the number of seconds the driver will wait for a 
	 * <code>Statement</code> object to execute to the given number of seconds.
	 * If the limit is exceeded, an <code>SQLException</code> is thrown. A JDBC
	 * driver must apply this limit to the <code>execute</code>,
	 * <code>executeQuery</code> and <code>executeUpdate</code> methods. JDBC driver
	 * implementations may also apply this limit to <code>ResultSet</code> methods
	 * (consult your driver vendor documentation for details).
	 *
	 * @param seconds the new query timeout limit in seconds; zero means 
	 *		there is no limit
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code>
	 *			or the condition seconds >= 0 is not satisfied
	 * @see #getQueryTimeout
	 */
	@Override
	public void setQueryTimeout(int seconds) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Cancels this <code>Statement</code> object if both the DBMS and
	 * driver support aborting an SQL statement.
	 * This method can be used by one thread to cancel a statement that
	 * is being executed by another thread.
	 *
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
	 * this method
	 */
	@Override
	public void cancel() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Retrieves the first warning reported by calls on this <code>Statement</code> object.
	 * Subsequent <code>Statement</code> object warnings will be chained to this
	 * <code>SQLWarning</code> object.
	 *
	 * <p>The warning chain is automatically cleared each time
	 * a statement is (re)executed. This method may not be called on a closed
	 * <code>Statement</code> object; doing so will cause an <code>SQLException</code>
	 * to be thrown.
	 *
	 * <P><B>Note:</B> If you are processing a <code>ResultSet</code> object, any
	 * warnings associated with reads on that <code>ResultSet</code> object 
	 * will be chained on it rather than on the <code>Statement</code>
	 * object that produced it.
	 *
	 * @return the first <code>SQLWarning</code> object or <code>null</code> 
	 *		 if there are no warnings
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 */
	@Override
	public SQLWarning getWarnings() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Clears all the warnings reported on this <code>Statement</code>
	 * object. After a call to this method,
	 * the method <code>getWarnings</code> will return 
	 * <code>null</code> until a new warning is reported for this
	 * <code>Statement</code> object.  
	 *
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 */
	@Override
	public void clearWarnings() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Sets the SQL cursor name to the given <code>String</code>, which 
	 * will be used by subsequent <code>Statement</code> object 
	 * <code>execute</code> methods. This name can then be
	 * used in SQL positioned update or delete statements to identify the
	 * current row in the <code>ResultSet</code> object generated by this 
	 * statement.  If the database does not support positioned update/delete, 
	 * this method is a noop.  To insure that a cursor has the proper isolation
	 * level to support updates, the cursor's <code>SELECT</code> statement 
	 * should have the form <code>SELECT FOR UPDATE</code>.  If 
	 * <code>FOR UPDATE</code> is not present, positioned updates may fail.
	 *
	 * <P><B>Note:</B> By definition, the execution of positioned updates and
	 * deletes must be done by a different <code>Statement</code> object than 
	 * the one that generated the <code>ResultSet</code> object being used for 
	 * positioning. Also, cursor names must be unique within a connection.
	 *
	 * @param name the new cursor name, which must be unique within
	 *			 a connection
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @throws SQLFeatureNotSupportedException  if the JDBC driver does not support this method
	 */
	@Override
	public void setCursorName(String name) throws SQLException {
		throw new SQLException("not supported");
	}

	//----------------------- Multiple Results --------------------------

	/**
	 * Executes the given SQL statement, which may return multiple results.
	 * In some (uncommon) situations, a single SQL statement may return
	 * multiple result sets and/or update counts.  Normally you can ignore
	 * this unless you are (1) executing a stored procedure that you know may
	 * return multiple results or (2) you are dynamically executing an
	 * unknown SQL string.  
	 * <P>
	 * The <code>execute</code> method executes an SQL statement and indicates the
	 * form of the first result.  You must then use the methods 
	 * <code>getResultSet</code> or <code>getUpdateCount</code>
	 * to retrieve the result, and <code>getMoreResults</code> to
	 * move to any subsequent result(s).
	 *
	 * @param sql any SQL statement
	 * @return <code>true</code> if the first result is a <code>ResultSet</code> 
	 *		 object; <code>false</code> if it is an update count or there are 
	 *		 no results
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code> 
	 * @see #getResultSet
	 * @see #getUpdateCount
	 * @see #getMoreResults 
	 */
	@Override
	public boolean execute(String sql) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 *  Retrieves the current result as a <code>ResultSet</code> object. 
	 *  This method should be called only once per result.
	 *
	 * @return the current result as a <code>ResultSet</code> object or
	 * <code>null</code> if the result is an update count or there are no more results
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @see #execute 
	 */
	@Override
	public ResultSet getResultSet() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 *  Retrieves the current result as an update count;
	 *  if the result is a <code>ResultSet</code> object or there are no more results, -1
	 *  is returned. This method should be called only once per result.
	 * 
	 * @return the current result as an update count; -1 if the current result is a
	 * <code>ResultSet</code> object or there are no more results
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @see #execute 
	 */
	@Override
	public int getUpdateCount() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Moves to this <code>Statement</code> object's next result, returns
	 * <code>true</code> if it is a <code>ResultSet</code> object, and
	 * implicitly closes any current <code>ResultSet</code>
	 * object(s) obtained with the method <code>getResultSet</code>.
	 *
	 * <P>There are no more results when the following is true:
	 * <PRE>
	 *	 // stmt is a Statement object
	 *	 ((stmt.getMoreResults() == false) && (stmt.getUpdateCount() == -1))
	 * </PRE>
	 *
	 * @return <code>true</code> if the next result is a <code>ResultSet</code>
	 *		 object; <code>false</code> if it is an update count or there are 
	 *		 no more results
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @see #execute 
	 */
	@Override
	public boolean getMoreResults() throws SQLException {
		throw new SQLException("not supported");
	}

	//--------------------------JDBC 2.0-----------------------------

	/**
	 * Gives the driver a hint as to the direction in which
	 * rows will be processed in <code>ResultSet</code>
	 * objects created using this <code>Statement</code> object.  The 
	 * default value is <code>ResultSet.FETCH_FORWARD</code>.
	 * <P>
	 * Note that this method sets the default fetch direction for 
	 * result sets generated by this <code>Statement</code> object.
	 * Each result set has its own methods for getting and setting
	 * its own fetch direction.
	 *
	 * @param direction the initial direction for processing rows
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code> 
	 * or the given direction
	 * is not one of <code>ResultSet.FETCH_FORWARD</code>,
	 * <code>ResultSet.FETCH_REVERSE</code>, or <code>ResultSet.FETCH_UNKNOWN</code>
	 * @since 1.2
	 * @see #getFetchDirection
	 */
	@Override
	public void setFetchDirection(int direction) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Retrieves the direction for fetching rows from
	 * database tables that is the default for result sets
	 * generated from this <code>Statement</code> object.
	 * If this <code>Statement</code> object has not set
	 * a fetch direction by calling the method <code>setFetchDirection</code>,
	 * the return value is implementation-specific.
	 *
	 * @return the default fetch direction for result sets generated
	 *		  from this <code>Statement</code> object
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @since 1.2
	 * @see #setFetchDirection
	 */
	@Override
	public int getFetchDirection() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Gives the JDBC driver a hint as to the number of rows that should 
	 * be fetched from the database when more rows are needed for
	 * <code>ResultSet</code> objects genrated by this <code>Statement</code>. 
	 * If the value specified is zero, then the hint is ignored.
	 * The default value is zero.
	 *
	 * @param rows the number of rows to fetch
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code> or the
	 *		condition  <code>rows >= 0</code> is not satisfied.
	 * @since 1.2
	 * @see #getFetchSize
	 */
	@Override
	public void setFetchSize(int rows) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Retrieves the number of result set rows that is the default 
	 * fetch size for <code>ResultSet</code> objects
	 * generated from this <code>Statement</code> object.
	 * If this <code>Statement</code> object has not set
	 * a fetch size by calling the method <code>setFetchSize</code>,
	 * the return value is implementation-specific.
	 *
	 * @return the default fetch size for result sets generated
	 *		  from this <code>Statement</code> object
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @since 1.2
	 * @see #setFetchSize
	 */
	@Override
	public int getFetchSize() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Retrieves the result set concurrency for <code>ResultSet</code> objects
	 * generated by this <code>Statement</code> object.
	 *
	 * @return either <code>ResultSet.CONCUR_READ_ONLY</code> or
	 * <code>ResultSet.CONCUR_UPDATABLE</code>
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @since 1.2
	 */
	@Override
	public int getResultSetConcurrency() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Retrieves the result set type for <code>ResultSet</code> objects
	 * generated by this <code>Statement</code> object.
	 *
	 * @return one of <code>ResultSet.TYPE_FORWARD_ONLY</code>,
	 * <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or	
	 * <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @since 1.2
	 */
	@Override
	public int getResultSetType()  throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Adds the given SQL command to the current list of commmands for this
	 * <code>Statement</code> object. The commands in this list can be
	 * executed as a batch by calling the method <code>executeBatch</code>.
	 * <P>
	 *
	 * @param sql typically this is a SQL <code>INSERT</code> or 
	 * <code>UPDATE</code> statement
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code> or the
	 * driver does not support batch updates
	 * @see #executeBatch
	 * @see DatabaseMetaData#supportsBatchUpdates
	 * @since 1.2
	 */
	@Override
	public void addBatch( String sql ) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Empties this <code>Statement</code> object's current list of 
	 * SQL commands.
	 * <P>
	 * @exception SQLException if a database access error occurs, 
	 *  this method is called on a closed <code>Statement</code> or the
	 * driver does not support batch updates
	 * @see #addBatch	
	 * @see DatabaseMetaData#supportsBatchUpdates
	 * @since 1.2
	 */
	@Override
	public void clearBatch() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Submits a batch of commands to the database for execution and
	 * if all commands execute successfully, returns an array of update counts.
	 * The <code>int</code> elements of the array that is returned are ordered
	 * to correspond to the commands in the batch, which are ordered 
	 * according to the order in which they were added to the batch.
	 * The elements in the array returned by the method <code>executeBatch</code>
	 * may be one of the following:
	 * <OL>
	 * <LI>A number greater than or equal to zero -- indicates that the
	 * command was processed successfully and is an update count giving the
	 * number of rows in the database that were affected by the command's
	 * execution
	 * <LI>A value of <code>SUCCESS_NO_INFO</code> -- indicates that the command was
	 * processed successfully but that the number of rows affected is
	 * unknown
	 * <P> 
	 * If one of the commands in a batch update fails to execute properly,
	 * this method throws a <code>BatchUpdateException</code>, and a JDBC
	 * driver may or may not continue to process the remaining commands in
	 * the batch.  However, the driver's behavior must be consistent with a
	 * particular DBMS, either always continuing to process commands or never
	 * continuing to process commands.  If the driver continues processing
	 * after a failure, the array returned by the method
	 * <code>BatchUpdateException.getUpdateCounts</code>
	 * will contain as many elements as there are commands in the batch, and
	 * at least one of the elements will be the following:
	 * <P> 
	 * <LI>A value of <code>EXECUTE_FAILED</code> -- indicates that the command failed
	 * to execute successfully and occurs only if a driver continues to
	 * process commands after a command fails
	 * </OL>
	 * <P>
	 * The possible implementations and return values have been modified in
	 * the Java 2 SDK, Standard Edition, version 1.3 to
	 * accommodate the option of continuing to proccess commands in a batch
	 * update after a <code>BatchUpdateException</code> obejct has been thrown.
	 *
	 * @return an array of update counts containing one element for each
	 * command in the batch.  The elements of the array are ordered according 
	 * to the order in which commands were added to the batch.
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code> or the
	 * driver does not support batch statements. Throws {@link BatchUpdateException}
	 * (a subclass of <code>SQLException</code>) if one of the commands sent to the
	 * database fails to execute properly or attempts to return a result set.
	 *
	 *
	 * @see #addBatch	
	 * @see DatabaseMetaData#supportsBatchUpdates
	 * @since 1.3
	 */
	@Override
	public int[] executeBatch() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Retrieves the <code>Connection</code> object
	 * that produced this <code>Statement</code> object.
	 * @return the connection that produced this statement
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @since 1.2
	 */
	@Override
	public Connection getConnection()  throws SQLException {
		throw new SQLException("not supported");
	}

	//--------------------------JDBC 3.0-----------------------------

	/** 
	 * The constant indicating that the current <code>ResultSet</code> object 
	 * should be closed when calling <code>getMoreResults</code>.
	 *
	 * @since 1.4
	 */
	int CLOSE_CURRENT_RESULT = 1;

	/**
	 * The constant indicating that the current <code>ResultSet</code> object
	 * should not be closed when calling <code>getMoreResults</code>.
	 *
	 * @since 1.4
	 */
	int KEEP_CURRENT_RESULT = 2;

	/**
	 * The constant indicating that all <code>ResultSet</code> objects that
	 * have previously been kept open should be closed when calling
	 * <code>getMoreResults</code>.
	 *
	 * @since 1.4
	 */
	int CLOSE_ALL_RESULTS = 3;

	/**
	 * The constant indicating that a batch statement executed successfully
	 * but that no count of the number of rows it affected is available.
	 *
	 * @since 1.4
	 */
	int SUCCESS_NO_INFO = -2;

	/**
	 * The constant indicating that an error occured while executing a
	 * batch statement.
	 *
	 * @since 1.4
	 */
	int EXECUTE_FAILED = -3;

	/**
	 * The constant indicating that generated keys should be made 
	 * available for retrieval.
	 *
	 * @since 1.4
	 */
	int RETURN_GENERATED_KEYS = 1;

	/**
	 * The constant indicating that generated keys should not be made 
	 * available for retrieval.
	 *
	 * @since 1.4
	 */
	int NO_GENERATED_KEYS = 2;

	/**
	 * Moves to this <code>Statement</code> object's next result, deals with
	 * any current <code>ResultSet</code> object(s) according  to the instructions
	 * specified by the given flag, and returns
	 * <code>true</code> if the next result is a <code>ResultSet</code> object.
	 *
	 * <P>There are no more results when the following is true:
	 * <PRE>
	 *	 // stmt is a Statement object
	 *	 ((stmt.getMoreResults(current) == false) && (stmt.getUpdateCount() == -1))
	 * </PRE>
	 *
	 * @param current one of the following <code>Statement</code>
	 *		constants indicating what should happen to current 
	 *		<code>ResultSet</code> objects obtained using the method
	 *		<code>getResultSet</code>:
	 *		<code>Statement.CLOSE_CURRENT_RESULT</code>, 
	 *		<code>Statement.KEEP_CURRENT_RESULT</code>, or
	 *		<code>Statement.CLOSE_ALL_RESULTS</code>
	 * @return <code>true</code> if the next result is a <code>ResultSet</code> 
	 *		 object; <code>false</code> if it is an update count or there are no 
	 *		 more results
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code> or the argument
	 *		 supplied is not one of the following:
	 *		<code>Statement.CLOSE_CURRENT_RESULT</code>, 
	 *		<code>Statement.KEEP_CURRENT_RESULT</code> or
	 *		<code>Statement.CLOSE_ALL_RESULTS</code>
	 *@exception SQLFeatureNotSupportedException if 
	 * <code>DatabaseMetaData.supportsMultipleOpenResults</code> returns 
	 * <code>false</code> and either 
	 *		<code>Statement.KEEP_CURRENT_RESULT</code> or
	 *		<code>Statement.CLOSE_ALL_RESULTS</code> are supplied as
	 * the argument.
	 * @since 1.4
	 * @see #execute
	 */
	@Override
	public boolean getMoreResults(int current) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Retrieves any auto-generated keys created as a result of executing this
	 * <code>Statement</code> object. If this <code>Statement</code> object did 
	 * not generate any keys, an empty <code>ResultSet</code>
	 * object is returned.
	 *
	 *<p><B>Note:</B>If the columns which represent the auto-generated keys were not specified,
	 * the JDBC driver implementation will determine the columns which best represent the auto-generated keys.
	 *
	 * @return a <code>ResultSet</code> object containing the auto-generated key(s) 
	 *		 generated by the execution of this <code>Statement</code> object
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 * @throws SQLFeatureNotSupportedException  if the JDBC driver does not support this method
	 * @since 1.4
	 */
	@Override
	public ResultSet getGeneratedKeys() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Executes the given SQL statement and signals the driver with the
	 * given flag about whether the
	 * auto-generated keys produced by this <code>Statement</code> object
	 * should be made available for retrieval.  The driver will ignore the 
	 * flag if the SQL statement
	 * is not an <code>INSERT</code> statement, or an SQL statement able to return
	 * auto-generated keys (the list of such statements is vendor-specific).
	 *
	 * @param sql an SQL Data Manipulation Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or
	 * <code>DELETE</code>; or an SQL statement that returns nothing, 
	 * such as a DDL statement.
	 *
	 * @param autoGeneratedKeys a flag indicating whether auto-generated keys
	 *		should be made available for retrieval;
	 *		 one of the following constants:
	 *		 <code>Statement.RETURN_GENERATED_KEYS</code>
	 *		 <code>Statement.NO_GENERATED_KEYS</code>
	 * @return either (1) the row count for SQL Data Manipulation Language (DML) statements
	 *		 or (2) 0 for SQL statements that return nothing
	 *
	 * @exception SQLException if a database access error occurs,
	 *  this method is called on a closed <code>Statement</code>, the given
	 *			SQL statement returns a <code>ResultSet</code> object, or
	 *			the given constant is not one of those allowed
	 * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
	 * this method with a constant of Statement.RETURN_GENERATED_KEYS
	 * @since 1.4
	 */
	@Override
	public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Executes the given SQL statement and signals the driver that the
	 * auto-generated keys indicated in the given array should be made available
	 * for retrieval.   This array contains the indexes of the columns in the 
	 * target table that contain the auto-generated keys that should be made
	 * available. The driver will ignore the array if the SQL statement
	 * is not an <code>INSERT</code> statement, or an SQL statement able to return
	 * auto-generated keys (the list of such statements is vendor-specific).
	 *
	 * @param sql an SQL Data Manipulation Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or
	 * <code>DELETE</code>; or an SQL statement that returns nothing, 
	 * such as a DDL statement.
	 *
	 * @param columnIndexes an array of column indexes indicating the columns
	 *		that should be returned from the inserted row
	 * @return either (1) the row count for SQL Data Manipulation Language (DML) statements
	 *		 or (2) 0 for SQL statements that return nothing
	 *
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code>, the SQL
	 *			statement returns a <code>ResultSet</code> object, or the
	 *			second argument supplied to this method is not an <code>int</code> array
	 *			whose elements are valid column indexes 
	 * @throws SQLFeatureNotSupportedException  if the JDBC driver does not support this method
	 * @since 1.4
	 */
	@Override
	public int executeUpdate(String sql, int columnIndexes[]) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Executes the given SQL statement and signals the driver that the
	 * auto-generated keys indicated in the given array should be made available
	 * for retrieval.   This array contains the names of the columns in the 
	 * target table that contain the auto-generated keys that should be made
	 * available. The driver will ignore the array if the SQL statement
	 * is not an <code>INSERT</code> statement, or an SQL statement able to return
	 * auto-generated keys (the list of such statements is vendor-specific).
	 *
	 * @param sql an SQL Data Manipulation Language (DML) statement, such as <code>INSERT</code>, <code>UPDATE</code> or
	 * <code>DELETE</code>; or an SQL statement that returns nothing, 
	 * such as a DDL statement.
	 * @param columnNames an array of the names of the columns that should be 
	 *		returned from the inserted row
	 * @return either the row count for <code>INSERT</code>, <code>UPDATE</code>,
	 *		 or <code>DELETE</code> statements, or 0 for SQL statements 
	 *		 that return nothing
	 * @exception SQLException if a database access error occurs, 
	 *  this method is called on a closed <code>Statement</code>, the SQL
	 *			statement returns a <code>ResultSet</code> object, or the
	 *			second argument supplied to this method is not a <code>String</code> array
	 *			whose elements are valid column names
	 *
	 * @throws SQLFeatureNotSupportedException  if the JDBC driver does not support this method
	 * @since 1.4
	 */
	@Override
	public int executeUpdate(String sql, String columnNames[]) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Executes the given SQL statement, which may return multiple results,
	 * and signals the driver that any
	 * auto-generated keys should be made available
	 * for retrieval.  The driver will ignore this signal if the SQL statement
	 * is not an <code>INSERT</code> statement, or an SQL statement able to return
	 * auto-generated keys (the list of such statements is vendor-specific).
	 * <P>
	 * In some (uncommon) situations, a single SQL statement may return
	 * multiple result sets and/or update counts.  Normally you can ignore
	 * this unless you are (1) executing a stored procedure that you know may
	 * return multiple results or (2) you are dynamically executing an
	 * unknown SQL string.  
	 * <P>
	 * The <code>execute</code> method executes an SQL statement and indicates the
	 * form of the first result.  You must then use the methods 
	 * <code>getResultSet</code> or <code>getUpdateCount</code>
	 * to retrieve the result, and <code>getMoreResults</code> to
	 * move to any subsequent result(s).
	 *
	 * @param sql any SQL statement
	 * @param autoGeneratedKeys a constant indicating whether auto-generated 
	 *		keys should be made available for retrieval using the method
	 *		<code>getGeneratedKeys</code>; one of the following constants:
	 *		<code>Statement.RETURN_GENERATED_KEYS</code> or
	 *		  <code>Statement.NO_GENERATED_KEYS</code>
	 * @return <code>true</code> if the first result is a <code>ResultSet</code>
	 *		 object; <code>false</code> if it is an update count or there are
	 *		 no results
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code> or the second 
	 *		 parameter supplied to this method is not 
	 *		 <code>Statement.RETURN_GENERATED_KEYS</code> or
	 *		 <code>Statement.NO_GENERATED_KEYS</code>.
	 * @exception SQLFeatureNotSupportedException if the JDBC driver does not support
	 * this method with a constant of Statement.RETURN_GENERATED_KEYS
	 * @see #getResultSet
	 * @see #getUpdateCount
	 * @see #getMoreResults
	 * @see #getGeneratedKeys
	 *
	 * @since 1.4 
	 */
	@Override
	public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Executes the given SQL statement, which may return multiple results,
	 * and signals the driver that the
	 * auto-generated keys indicated in the given array should be made available
	 * for retrieval.  This array contains the indexes of the columns in the 
	 * target table that contain the auto-generated keys that should be made
	 * available.  The driver will ignore the array if the SQL statement
	 * is not an <code>INSERT</code> statement, or an SQL statement able to return
	 * auto-generated keys (the list of such statements is vendor-specific).
	 * <P>
	 * Under some (uncommon) situations, a single SQL statement may return
	 * multiple result sets and/or update counts.  Normally you can ignore
	 * this unless you are (1) executing a stored procedure that you know may
	 * return multiple results or (2) you are dynamically executing an
	 * unknown SQL string.  
	 * <P>
	 * The <code>execute</code> method executes an SQL statement and indicates the
	 * form of the first result.  You must then use the methods 
	 * <code>getResultSet</code> or <code>getUpdateCount</code>
	 * to retrieve the result, and <code>getMoreResults</code> to
	 * move to any subsequent result(s).
	 *
	 * @param sql any SQL statement
	 * @param columnIndexes an array of the indexes of the columns in the 
	 *		inserted row that should be  made available for retrieval by a
	 *		call to the method <code>getGeneratedKeys</code>
	 * @return <code>true</code> if the first result is a <code>ResultSet</code> 
	 *		 object; <code>false</code> if it is an update count or there 
	 *		 are no results
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code> or the 
	 *			elements in the <code>int</code> array passed to this method
	 *			are not valid column indexes
	 * @throws SQLFeatureNotSupportedException  if the JDBC driver does not support this method
	 * @see #getResultSet
	 * @see #getUpdateCount
	 * @see #getMoreResults
	 *
	 * @since 1.4
	 */
	@Override
	public boolean execute(String sql, int columnIndexes[]) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Executes the given SQL statement, which may return multiple results,
	 * and signals the driver that the
	 * auto-generated keys indicated in the given array should be made available
	 * for retrieval. This array contains the names of the columns in the 
	 * target table that contain the auto-generated keys that should be made
	 * available.  The driver will ignore the array if the SQL statement
	 * is not an <code>INSERT</code> statement, or an SQL statement able to return
	 * auto-generated keys (the list of such statements is vendor-specific).
	 * <P>
	 * In some (uncommon) situations, a single SQL statement may return
	 * multiple result sets and/or update counts.  Normally you can ignore
	 * this unless you are (1) executing a stored procedure that you know may
	 * return multiple results or (2) you are dynamically executing an
	 * unknown SQL string.  
	 * <P>
	 * The <code>execute</code> method executes an SQL statement and indicates the
	 * form of the first result.  You must then use the methods 
	 * <code>getResultSet</code> or <code>getUpdateCount</code>
	 * to retrieve the result, and <code>getMoreResults</code> to
	 * move to any subsequent result(s).
	 *
	 * @param sql any SQL statement
	 * @param columnNames an array of the names of the columns in the inserted
	 *		row that should be made available for retrieval by a call to the
	 *		method <code>getGeneratedKeys</code>
	 * @return <code>true</code> if the next result is a <code>ResultSet</code> 
	 *		 object; <code>false</code> if it is an update count or there 
	 *		 are no more results
	 * @exception SQLException if a database access error occurs, 
	 * this method is called on a closed <code>Statement</code> or the 
	 *		  elements of the <code>String</code> array passed to this
	 *		  method are not valid column names
	 * @throws SQLFeatureNotSupportedException  if the JDBC driver does not support this method
	 * @see #getResultSet
	 * @see #getUpdateCount
	 * @see #getMoreResults
	 * @see #getGeneratedKeys
	 *
	 * @since 1.4 
	 */
	@Override
	public boolean execute(String sql, String columnNames[]) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Retrieves the result set holdability for <code>ResultSet</code> objects
	 * generated by this <code>Statement</code> object.
	 *
	 * @return either <code>ResultSet.HOLD_CURSORS_OVER_COMMIT</code> or
	 *		 <code>ResultSet.CLOSE_CURSORS_AT_COMMIT</code>
	 * @exception SQLException if a database access error occurs or 
	 * this method is called on a closed <code>Statement</code>
	 *
	 * @since 1.4
	 */
	@Override
	public int getResultSetHoldability() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Retrieves whether this <code>Statement</code> object has been closed. A <code>Statement</code> is closed if the
	 * method close has been called on it, or if it is automatically closed.
	 * @return true if this <code>Statement</code> object is closed; false if it is still open
	 * @throws SQLException if a database access error occurs
	 * @since 1.6
	 */
	@Override
	public boolean isClosed() throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Requests that a <code>Statement</code> be pooled or not pooled.  The value 
	 * specified is a hint to the statement pool implementation indicating 
	 * whether the applicaiton wants the statement to be pooled.  It is up to 
	 * the statement pool manager as to whether the hint is used.
	 * <p>
	 * The poolable value of a statement is applicable to both internal 
	 * statement caches implemented by the driver and external statement caches 
	 * implemented by application servers and other applications.
	 * <p>
	 * By default, a <code>Statement</code> is not poolable when created, and 
	 * a <code>PreparedStatement</code> and <code>CallableStatement</code> 
	 * are poolable when created.
	 * <p>
	 * @param poolable		requests that the statement be pooled if true and
	 * 						that the statement not be pooled if false 
	 * <p>
	 * @throws SQLException if this method is called on a closed 
	 * <code>Statement</code>
	 * <p>
	 * @since 1.6
	 */
	@Override
	public void setPoolable(boolean poolable) throws SQLException {
		throw new SQLException("not supported");
	}

	/**
	 * Returns a  value indicating whether the <code>Statement</code>
	 * is poolable or not.
	 * <p>
	 * @return		<code>true</code> if the <code>Statement</code> 
	 * is poolable; <code>false</code> otherwise
	 * <p>
	 * @throws SQLException if this method is called on a closed 
	 * <code>Statement</code>
	 * <p>
	 * @since 1.6
	 * <p>
	 * @see java.sql.Statement#setPoolable(boolean) setPoolable(boolean)
	 */
	@Override
	public boolean isPoolable() throws SQLException {
		throw new SQLException("not supported");
	}
}
